The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2003
Filed:
Apr. 02, 2001
Gregory L. Keaton, San Francisco, CA (US);
Mark A. Arbore, Los Altos, CA (US);
Thomas J. Kane, Menlo Park, CA (US);
Lightwave Electronics, Mountain View, CA (US);
Abstract
An apparatus and a method for separating a light of a first wavelength &lgr; from a second wavelength &lgr; , where &lgr; <&lgr; , in a waveguide such as an optical fiber is described. The apparatus includes a core surrounded by a depressed cladding, which itself is surrounded by a secondary cladding. The core cross-section, the depressed cladding cross-section, the secondary cladding cross-section, and the refractive indices of the core, the depressed cladding and the secondary cladding are selected to produce a fundamental mode cutoff wavelength &lgr; such that &lgr; &lgr; <&lgr; , and produce a high loss at the secondary wavelength &lgr; . The apparatus can be used as a filter, an amplifier, a laser, or in a nonlinear optical switch.